#include <stdio.h>

int main(void) {
	float a,b;
	char ch;
	scanf("%f%c%f", &a, &ch, &b);
	switch (ch)
	{
		case '+': printf("=%.2f", a + b); break;
		case '-': printf("=%.2f", a - b); break;
		case '*': printf("=%.2f", a * b); break;
		case '/': printf("=%.2f", a / b); break;
		default: printf("Unknown operator");
	}
	return 0;
}